21019585842460 has 12 divisors (see below), whose sum is σ = 44141130269208. Its totient is φ = 8407834336976.

The previous prime is 21019585842443. The next prime is 21019585842469. The reversal of 21019585842460 is 6424858591012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21019585842469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525489646042 + ... + 525489646081.

It is an arithmetic number, because the mean of its divisors is an integer number (3678427522434).

Almost surely, 2^{21019585842460} is an apocalyptic number.

21019585842460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21019585842460 is an abundant number, since it is smaller than the sum of its proper divisors (23121544426748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21019585842460 is a wasteful number, since it uses less digits than its factorization.

21019585842460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050979292132 (or 1050979292130 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 55.

The spelling of 21019585842460 in words is "twenty-one trillion, nineteen billion, five hundred eighty-five million, eight hundred forty-two thousand, four hundred sixty".